CN106050771A - Hydraulic loop for multifunctional tool of excavator - Google Patents
Hydraulic loop for multifunctional tool of excavator Download PDFInfo
- Publication number
- CN106050771A CN106050771A CN201610467372.4A CN201610467372A CN106050771A CN 106050771 A CN106050771 A CN 106050771A CN 201610467372 A CN201610467372 A CN 201610467372A CN 106050771 A CN106050771 A CN 106050771A
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- Prior art keywords
- valve
- hydraulic
- oil
- pilot
- broken
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a hydraulic loop for a multifunctional tool of an excavator, and relates to the technical field of excavator hydraulic pressure. The pilot side Xa of a spare valve element is connected with a shuttle valve. The two ends of the shuttle valve are connected with a breaking pilot control valve and a pilot solenoid valve correspondingly. The pilot side Xb of the spare valve element is connected with the pilot solenoid valve. A main pump is connected with the spare valve element. End port overflow valves are arranged on oil ways of the spare valve element and connected to a hydraulic oil tank. The oil ways of the spare valve element are connected with work device pipelines without control valve blocks to the multifunctional tool. A two-position three-way reversing valve is mounted on the work device pipeline connected with one oil way. The other oil way of the spare valve element is further connected to the hydraulic oil tank through a stop valve and a breaking overflow valve. According to the hydraulic loop, the pipelines are optimized; maintainability is high; the utilization rate of a single pipeline is effectively increased; the function of being provided with multiple auxiliary tools is achieved; and cost is low.
Description
Technical field
The present invention relates to excavator technical field of hydraulic pressure, particularly relate to a kind of hydraulic pressure for excavator multifunctional tool and return
Road.
Background technology
Excavator is used for crushing, shear, when grabbing the operating modes such as folder, hydraulic system need to install additional broken, shear, grab the correspondences such as folder
Fluid pressure line.In practical engineering application, excavator typically installs quartering hammer hydraulic principle additional as shown in Figure 1, quartering hammer 701
P mouth drives quartering hammer work, the T mouth oil return of quartering hammer 701 through main valve standby spool 3 oil-feed.Generally without standby during oil return
With spool 3, but through equipment pipeline 6 (containing valve block), directly take back hydraulic oil container 1 or be followed by hydraulic oil container through radiator
1；And when installing shearing additional, grab the two-way operation facility such as folder, hydraulic oil-returning need to cause and install quartering hammer through standby spool 3 additional and add
Dress is sheared, return line does not shares when grabbing the two-way operation facility such as folder, causes quartering hammer and shearing, grabs the two-way operation facility such as folder
Put into relatively big during switching, time-consuming.
Additionally quartering hammer operating pressure is low compared with excavator main valve setting service pressure, is set up by external overflow valve 14
Quartering hammer operating pressure, based on installing, debugging many considerations such as convenience, external overflow valve 14 is generally mounted to work clothes
Put in pipeline.Owing to former broken pipeline has above particularity, excavator is as changed the outfit other facility in addition to quartering hammer, former
Having broken pipeline then can not use, need to rearrange pipeline, single circuits utilization rate is on the low side, puts into relatively big, the most time-consuming.
Therefore, those skilled in the art is devoted to develop a kind of hydraulic circuit for excavator multifunctional tool.
Summary of the invention
Because the drawbacks described above of prior art, the technical problem to be solved is to provide a kind of for excavator
The hydraulic circuit of multifunctional tool, simple in construction, reasonable in design, optimize pipeline, maintainable high, it is effectively increased single circuits
Utilization rate, possess multiple attached facility function, low cost, practical, it is easy to promote the use of.
For achieving the above object, the invention provides a kind of hydraulic circuit for excavator multifunctional tool, including liquid
Force feed case, main pump, standby spool, port overflow valve, two position three way directional control valve, equipment pipeline, multifunctional tool, broken overflow
Stream valve, stop valve, broken pilot-actuated valve, shuttle valve, pilot solenoid valve and pioneer pump, the Xa Lead side of standby spool is with shuttle valve even
Connecing, the two ends of shuttle valve connect broken pilot-actuated valve, pilot solenoid valve, the Xb Lead side of standby spool and pilot solenoid valve respectively
Connecting, the X side of pilot solenoid valve, Y side are corresponding with the Xa Lead side of standby spool, Xb Lead side respectively to be connected, pilot solenoid valve,
Broken pilot-actuated valve is connected to pioneer pump, and pioneer pump, main pump are connected with hydraulic oil container by pipeline, and main pump connects service valve
Core, the oil circuit of standby spool, oil circuit are provided with port overflow valve, and port overflow valve is connected to hydraulic oil container, the oil of standby spool
On road, connection is without the equipment pipeline of control valve block to multifunctional tool, and the equipment pipeline that oil circuit connects is provided with two
Position three-way diverter valve, the oil circuit of standby spool is connected to hydraulic oil container also by stop valve, broken overflow valve.
As preferably, described multifunctional tool includes quartering hammer, hydraulic shear, the fuel feeding P mouth of quartering hammer, the oil of hydraulic shear
Cylinder big chamber C is connected with oil circuit by equipment pipeline, and the oil return T mouth of quartering hammer, the oil cylinder loculus D of hydraulic shear pass through work clothes
Put pipeline to be connected with oil circuit.
As preferably, 1 in described two position three way directional control valve is directly connected with hydraulic oil container by pipeline, two-position three way
In reversal valve 2 are connected with standby spool by oil circuit.
As preferably, described stop valve is arranged on the oil-feed side, front end of broken overflow valve, and two position three way directional control valve is arranged
In the oil return side, rear end of broken overflow valve, broken overflow valve oil inlet and oil return mouth is cut off valve and two position three way directional control valve completely cuts through,
Isolate out any impact on bidirectional hydraulic loop.
As preferably, described shuttle valve possesses bidirection press and selects and export, simultaneously can at shuttle valve input side no pressure signal
By the shuttle valve outlet side Xa mouth draining to standby spool.
As preferably, described two position three way directional control valve, stop valve all can use multiple control modes: manually, hydraulic control, electricity
Control etc.；Guide's solenoid directional control valve uses switching regulator solenoid directional control valve, according to real work needs and operating habit, and can be by guide
Solenoid directional control valve is adjusted to solenoid-operated proportional air relief valve or foot control valve is controlled.
The invention has the beneficial effects as follows: (1) shares a set of pipeline and control valve, on the premise of ensureing original performance, increase
Adding the function being equipped with multiple attached facility, function is more comprehensively, it is achieved the beneficial effect of one-machine-multi-function；
(2) decrease pipe arrangement, optimize pipeline, improve maintainability, be effectively improved single circuits utilization rate, drop simultaneously
Low cost.
Below with reference to accompanying drawing, the technique effect of design, concrete structure and the generation of the present invention is described further, with
It is fully understood from the purpose of the present invention, feature and effect.
Accompanying drawing explanation
Fig. 1 is the hydraulic schematic diagram of background technology；
Fig. 2 is the hydraulic schematic diagram of the present invention.
Detailed description of the invention
With reference to Fig. 2, this detailed description of the invention by the following technical solutions: a kind of hydraulic pressure for excavator multifunctional tool
Loop, including hydraulic oil container 1, main pump 2, standby spool 3, port overflow valve 4, two position three way directional control valve 5, equipment pipeline 6,
Multifunctional tool 7, broken overflow valve 8, stop valve 9, broken pilot-actuated valve 10, shuttle valve 11, pilot solenoid valve 12 and pioneer pump
13, the Xa Lead side of standby spool 3 is connected with shuttle valve 11, and the two ends of shuttle valve 11 connect broken pilot-actuated valve 10, guide respectively
Electromagnetic valve 12, when different pilot control unit controls the same same position of spool by pressure signal, is carried out by shuttle valve 11
Pressure signal selects and transmission；The Xb Lead side of standby spool 3 is connected with pilot solenoid valve 12, the X side of pilot solenoid valve 12, Y
Side is corresponding with the Xa Lead side of standby spool 3, Xb Lead side respectively to be connected, and pilot solenoid valve 12, broken pilot-actuated valve 10 are equal
Being connected to pioneer pump 13, pioneer pump 13, main pump 2 are connected with hydraulic oil container 1 by pipeline, and main pump 2 connects standby spool 3, standby
Being provided with port overflow valve 4 on the oil circuit A of spool 3, oil circuit B, port overflow valve 4 is connected to hydraulic oil container 1, the oil of standby spool 3
Road A, oil circuit B connect equipment pipeline 6 to multifunctional tool 7, and the equipment pipeline 6 that oil circuit B connects is provided with two
Three-way diverter valve 5, the oil circuit A of standby spool 3 is connected to hydraulic oil container 1 also by stop valve 9, broken overflow valve 8.
It should be noted that described multifunctional tool 7 includes quartering hammer 701, hydraulic shear 702, the fuel feeding of quartering hammer 701
P mouth, the oil cylinder big chamber C of hydraulic shear 702 are connected with oil circuit A by equipment pipeline 6, the oil return T mouth of quartering hammer 701, hydraulic pressure
Cut the oil cylinder loculus D of 702 to be connected with oil circuit B by equipment pipeline 6.
It should be noted that described equipment pipeline 6 is without carrying out the control valve block of pressure setting/direction controlling, just
In realizing sharing of multifunctional tool.
It should be noted that described stop valve 9 is arranged on the oil-feed side, front end of broken overflow valve 8, two-position three way commutates
Valve 5 is arranged on the oil return side, rear end of broken overflow valve 8, and broken overflow valve 8 oil inlet and oil return mouth is cut off valve 9 and two position three way directional control valve
5 completely cut through, and isolate out any impact on bidirectional hydraulic loop.
It should be noted that described shuttle valve 11 possesses bidirection press and selects and export, simultaneously at shuttle valve 11 input side
No pressure signal can pass through shuttle valve 11 outlet side XA mouth draining to standby spool 3.
Additionally, described two position three way directional control valve 5, stop valve 9 all can use multiple control modes: manually, hydraulic control, automatically controlled
Deng；Guide's solenoid directional control valve 12 uses switching regulator solenoid directional control valve, according to real work needs and operating habit, and can be by guide
Solenoid directional control valve 12 is adjusted to solenoid-operated proportional air relief valve or foot control valve is controlled.
This detailed description of the invention sets up two position three way directional control valve 5, stop valve 9, shuttle valve 11, elder generation on the basis of existing technology
Conduction magnet valve 12, compared with existing quartering hammer loop (Fig. 1), will crush the external overflow valve of pipeline 5 in equipment in situ and adjust
Whole to broken overflow valve 8, makes equipment pipeline 6 only have the effect of connection oil circuit, simultaneously crushing in this hydraulic circuit
Oil-feed side, overflow valve 8 front end increases stop valve 9, makes broken overflow valve 8 use according to mode of operation different choice；Multi Role Aircraft
Have 7 spool pilot control parts and increase pilot solenoid valve 12, owing to sharing standby spool 3 (Xa side) with crushing, and pilot pressure
Control signal comes from different control units, by shuttle valve 11, pilot control signal must be carried out real-time selection.
Below in conjunction with two kinds of different patterns, the operation principle of this detailed description of the invention is discussed further:
(1) quartering hammer pattern:
Pipeline valve block adjusts: first adjusts two position three way directional control valve 5 to 1, then adjusts stop valve 9 to opening, finally
Adjust the position-limitting pin of broken pilot-actuated valve 10, release spacing.During crushing operation, pilot control pressure signal is by crushing guide
Control valve 10 produces, and connects with standby spool 3 guide Xa side, make standby spool 3 be positioned at left position, oil circuit after being selected by shuttle valve 11
A is oily to quartering hammer P confession by equipment pipeline 6；Two position three way directional control valve 5 is in 1, and quartering hammer T mouth oil return passes through two
Position three-way diverter valve 5 returns to hydraulic oil container 1, and the oil circuit B of standby spool 3 is now in cut-off state；Standby spool 3 guide Xb side
Directly connected with hydraulic oil container 1 by position in pilot solenoid valve 12；Quartering hammer operating pressure relatively excavator main valve sets normal work
Make pressure low, crushed overflow valve 8 set up by being positioned at oil circuit B, it is ensured that quartering hammer safe and stable operation.
(2) multifunctional tool pattern (hydraulic shear):
Pipeline valve block adjusts: first adjusts two position three way directional control valve 5 to 2, then adjusts stop valve 9 to closed mode, finally
Adjust the position-limitting pin of broken pilot-actuated valve 10, keep spacing；
During hydraulic shear operation, pilot solenoid valve 12 carry out pilot control, after X side joint to the signal of telecommunication, pilot solenoid valve 12 action
To upper, the pilot control pressure signal of generation is connected with standby spool 3 guide Xa side after being selected by shuttle valve 11, promotes standby
Spool 3, on the right side of standby spool 3, spring cavity fluid is let out to hydraulic oil container 1 via pilot solenoid valve 12, makes standby spool 3 be positioned at a left side
Position, oil circuit A passes through equipment pipeline 6 chamber big to hydraulic shear oil cylinder C fuel feeding；Two position three way directional control valve 5 is now in 2, little
Chamber D oil return is after two position three way directional control valve 5, and directly by the oil return of standby spool 3, hydraulic shear cylinder piston rod stretches out, hydraulic shear
Complete to clamp shear action.
Y side joint to after the signal of telecommunication, pilot solenoid valve 12 action to the next, the pilot control pressure signal of generation and service valve
Core 3 guide Xb side connects, and promotes standby spool 3, and on the left of standby spool 3, spring cavity fluid is via pilot solenoid valve 12 or shuttle valve 11
Letting out to hydraulic oil container 1, make standby spool 3 be positioned at right position, hydraulic shear oil cylinder loculus D is supplied by oil circuit B by equipment pipeline 6
Oil；Big chamber C is through oil circuit A directly by the oil return of standby spool 3, and hydraulic shear cylinder piston rod is retracted, and hydraulic shear completes to unclamp action.
It is high that hydraulic shear typically requires that operating pressure the most relatively crushes operating pressure, and all have pressure requirements to bidirectional-movement,
Broken overflow valve 8 oil-in, oil return opening have been carried out by the closedown utilizing two position three way directional control valve 5 commutation to be in 2 and stop valve 9
Entirely block, be adequately isolated the impact on hydraulic circuit pressure of the broken overflow valve 8；The port overflow valve 4 subsidiary by main control valve is adjusted
Determine operating pressure, it is ensured that the strong work of hydraulic shear safety.
This detailed description of the invention not only meets the related request of original crushing function, and can make full use of existing excavation
The standby spool of 3-position 4-way that machine main control valve is reserved, by adjusting the position of former external broken overflow valve, increase stop valve,
Reversal valve realizes oil inlet and oil return and can switch in real time according to the needs of multifunctional tool, it is achieved the beneficial effect of one-machine-multi-function, pipe
Road is arranged simple, easy for installation, significantly reduces cost, it is achieved that excavator variable body " a many-side people " has the mesh of multiple function
, there is wide market application foreground.
The preferred embodiment of the present invention described in detail above.Should be appreciated that those of ordinary skill in the art without
Need creative work just can make many modifications and variations according to the design of the present invention.Therefore, all technology in the art
Personnel are available by logical analysis, reasoning, or a limited experiment the most on the basis of existing technology
Technical scheme, all should be in the protection domain being defined in the patent claims.
Claims (6)
1. the hydraulic circuit for excavator multifunctional tool, it is characterised in that: include hydraulic oil container (1), main pump (2),
Standby spool (3), port overflow valve (4), two position three way directional control valve (5), equipment pipeline (6), multifunctional tool (7), broken
Broken overflow valve (8), stop valve (9), broken pilot-actuated valve (10), shuttle valve (11), pilot solenoid valve (12) and pioneer pump (13),
The Xa Lead side of standby spool (3) is connected with shuttle valve (11), the two ends of shuttle valve (11) connect respectively broken pilot-actuated valve (10),
Pilot solenoid valve (12), the Xb Lead side of standby spool (3) is connected with pilot solenoid valve (12), pilot solenoid valve (12), broken
Pilot-actuated valve (10) is connected to pioneer pump (13), and pioneer pump (13), main pump (2) are connected with hydraulic oil container (1) by pipeline,
Main pump (2) connects standby spool (3), and the oil circuit A of standby spool (3), oil circuit B are provided with port overflow valve (4), port overflow
Valve (4) is connected to hydraulic oil container (1), and the oil circuit A of standby spool (3), oil circuit B connect the equipment pipeline (6) without control valve block
To multifunctional tool (7), the equipment pipeline (6) that oil circuit B connects is provided with two position three way directional control valve (5), standby spool
(3) oil circuit A is connected to hydraulic oil container (1) also by stop valve (9), broken overflow valve (8).
A kind of hydraulic circuit for excavator multifunctional tool, it is characterised in that: described many
Function facility (7) include quartering hammer (701), hydraulic shear (702), the fuel feeding P mouth of quartering hammer (701), the oil cylinder of hydraulic shear (702)
Big chamber C is connected with oil circuit A by equipment pipeline (6), the oil return T mouth of quartering hammer (701), hydraulic shear (702) oil cylinder little
Chamber D is connected with oil circuit B by equipment pipeline (6).
A kind of hydraulic circuit for excavator multifunctional tool, it is characterised in that: described two
In three-way diverter valve (5) 1 is directly connected with hydraulic oil container (1) by pipeline, and 2 in two position three way directional control valve (5) are led to
Cross oil circuit B to be connected with standby spool (3).
A kind of hydraulic circuit for excavator multifunctional tool, it is characterised in that: described guide
The X side of electromagnetic valve (12), Y side are corresponding with the Xa Lead side of standby spool (3), Xb Lead side respectively to be connected.
A kind of hydraulic circuit for excavator multifunctional tool, it is characterised in that: described cuts
Only valve (9) is arranged on the oil-feed side, front end of broken overflow valve (8), and two position three way directional control valve (5) is arranged on broken overflow valve (8)
Oil return side, rear end.
A kind of hydraulic circuit for excavator multifunctional tool, it is characterised in that: described elder generation
Conduction magnet valve (12) uses switching regulator solenoid directional control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610467372.4A CN106050771B (en) | 2016-06-23 | 2016-06-23 | A kind of hydraulic circuit for excavator multifunctional tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610467372.4A CN106050771B (en) | 2016-06-23 | 2016-06-23 | A kind of hydraulic circuit for excavator multifunctional tool |
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| Publication Number | Publication Date |
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| CN106050771A true CN106050771A (en) | 2016-10-26 |
| CN106050771B CN106050771B (en) | 2017-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610467372.4A Active CN106050771B (en) | 2016-06-23 | 2016-06-23 | A kind of hydraulic circuit for excavator multifunctional tool |
Country Status (1)
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107477050A (en) * | 2017-09-29 | 2017-12-15 | 三重机有限公司 | Broken oil return system, crushing mechanism and excavator |
| CN107956233A (en) * | 2017-11-29 | 2018-04-24 | 徐州徐工挖掘机械有限公司 | A kind of excavator multifunctional tool control of flow and pressure system |
| CN108916161A (en) * | 2018-08-24 | 2018-11-30 | 武汉联航机电有限公司 | A kind of atmospheric control and control method |
| CN109826273A (en) * | 2019-03-29 | 2019-05-31 | 三一重机有限公司 | Hydraulic pilot control system and excavator |
| CN110939171A (en) * | 2019-12-27 | 2020-03-31 | 三一重机有限公司 | Hydraulic system, excavator and control method |
| CN112177095A (en) * | 2020-11-02 | 2021-01-05 | 山东临工工程机械有限公司 | Hydraulic energy supply system and excavator |
| CN113585392A (en) * | 2021-08-05 | 2021-11-02 | 徐州徐工挖掘机械有限公司 | Hydraulic system of excavator and excavator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07259138A (en) * | 1994-03-24 | 1995-10-09 | Shin Caterpillar Mitsubishi Ltd | Traveling controller of construction machine |
| JPH0812269A (en) * | 1994-06-28 | 1996-01-16 | Komatsu Mec Corp | Method and device for extending and housing boom |
| CN202811578U (en) * | 2012-07-31 | 2013-03-20 | 三一重工股份有限公司 | Hydraulic oil circuit, oil throwing system and rotary drilling rig |
| CN103541395A (en) * | 2013-09-26 | 2014-01-29 | 徐州徐工挖掘机械有限公司 | Hydraulic excavator energy-conservation control system |
| CN105350598A (en) * | 2015-10-21 | 2016-02-24 | 徐工集团工程机械股份有限公司科技分公司 | Hydraulic control system for improving energy saving performance of loader and control method of hydraulic control system |
-
2016
- 2016-06-23 CN CN201610467372.4A patent/CN106050771B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07259138A (en) * | 1994-03-24 | 1995-10-09 | Shin Caterpillar Mitsubishi Ltd | Traveling controller of construction machine |
| JPH0812269A (en) * | 1994-06-28 | 1996-01-16 | Komatsu Mec Corp | Method and device for extending and housing boom |
| CN202811578U (en) * | 2012-07-31 | 2013-03-20 | 三一重工股份有限公司 | Hydraulic oil circuit, oil throwing system and rotary drilling rig |
| CN103541395A (en) * | 2013-09-26 | 2014-01-29 | 徐州徐工挖掘机械有限公司 | Hydraulic excavator energy-conservation control system |
| CN105350598A (en) * | 2015-10-21 | 2016-02-24 | 徐工集团工程机械股份有限公司科技分公司 | Hydraulic control system for improving energy saving performance of loader and control method of hydraulic control system |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107477050A (en) * | 2017-09-29 | 2017-12-15 | 三重机有限公司 | Broken oil return system, crushing mechanism and excavator |
| CN107956233A (en) * | 2017-11-29 | 2018-04-24 | 徐州徐工挖掘机械有限公司 | A kind of excavator multifunctional tool control of flow and pressure system |
| CN108916161A (en) * | 2018-08-24 | 2018-11-30 | 武汉联航机电有限公司 | A kind of atmospheric control and control method |
| CN108916161B (en) * | 2018-08-24 | 2023-09-26 | 武汉精智智能制造有限公司 | Pneumatic control system and control method |
| CN109826273A (en) * | 2019-03-29 | 2019-05-31 | 三一重机有限公司 | Hydraulic pilot control system and excavator |
| CN110939171A (en) * | 2019-12-27 | 2020-03-31 | 三一重机有限公司 | Hydraulic system, excavator and control method |
| CN110939171B (en) * | 2019-12-27 | 2024-01-26 | 三一重机有限公司 | Hydraulic system, excavator and control method |
| CN112177095A (en) * | 2020-11-02 | 2021-01-05 | 山东临工工程机械有限公司 | Hydraulic energy supply system and excavator |
| CN113585392A (en) * | 2021-08-05 | 2021-11-02 | 徐州徐工挖掘机械有限公司 | Hydraulic system of excavator and excavator |
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| Publication number | Publication date |
|---|---|
| CN106050771B (en) | 2017-12-15 |
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